How to Plan a Cottage Garden Border

Start with the Border Itself

A cottage border is really just a long, deep strip of soil that has been allowed to misbehave slightly. Before you buy a single plant, measure what you have and be honest about it. A border 1.2m (4ft) deep is workable; 1.5m (5ft) is better, because it lets you stagger three rows of planting rather than a single flat line. If your bed is shallower than 90cm, keep to one row of taller plants and let low growers spill onto the path instead.

Dig the whole strip over and fork in two or three barrows of well-rotted manure or garden compost. Cottage planting is greedy planting. Add a generous handful of blood, fish and bone per square metre, then leave it a fortnight before you plant anything. Spend a sunny afternoon watching how the light moves across the bed. Most British gardens have a good side and a sulky one, and the sun lovers belong in the former.

Give the Border a Skeleton

Every relaxed border needs a few plants doing the structural work, or it collapses into a muddle by July. Choose three or four shrubs and repeat them along the length of the bed, spacing them roughly 1.5m apart. Repetition is what makes a chaotic planting look deliberate.

• Rosa 'Gertrude Jekyll' or any repeat-flowering shrub rose for scent and midsummer weight.
• Lavandula angustifolia for a grey-green anchor at the front, especially where the soil is lean and sunny.
• Hydrangea 'Annabelle' for white domes in late summer on heavier, damper ground.
• Euonymus or Pittosporum for evergreen bulk if you want winter shape as well as summer flower.

Set these out first, in their pots, and walk round them. Move them until the spacing feels generous rather than tight. New gardeners always plant too closely, and cottage borders are supposed to be crowded, but the shrubs still need room for their roots.

Plant in Layers, Not Rows

The trick with a cottage border is to think in three depths. Tall, airy plants go at the back, mid-height fillers in the middle, and low, sprawling things at the front that can flop over the edge of the lawn or gravel. Many classic cottage plants are naturally floppy, which is part of the charm, so don't fight it.

For the back, look at Verbena bonariensis, Digitalis purpurea, Campanula lactiflora and Thalictrum. Verbena is the great cheat of the cottage border: its stems are almost transparent, so it adds height without screening anything behind it. For the middle, Salvia nemorosa, Nepeta 'Six Hills Giant', Penstemon and Astrantia major will carry you from June to September. At the front, use Alchemilla mollis, Geranium 'Rozanne', hardy geraniums generally, and Stachys byzantina for its silver leaves.

Plant in loose triangles rather than straight lines. Odd numbers look better than even ones, and a slight overlap between neighbours is exactly what you want.

Use Bulbs to Stretch the Season

This is where cottage borders earn their keep. Bulbs let you have flowers in the same patch of soil in April and again in August, because they have finished and gone under by the time the perennials need the space. Work them in among the roots of everything else.

• Snowdrops and crocus in January and February, planted in informal drifts of twenty or more.
• Narcissi in March and April, choosing a mix of early and late varieties so the display rolls on.
• Tulips for May. Treat them as annuals and plant fresh each autumn if you want a reliable show.
• Alliums in late May and June, floating above the emerging perennials on bare stems.
• Lilies and crocosmia for late summer, though keep crocosmia in check as it spreads.

Plant bulbs at three times their own depth, in clusters rather than single file, and mark where they are so you don't spear them with a fork later. Let the foliage die back naturally for six weeks before cutting it. It looks scruffy, but it feeds next spring's flowers.

Managing the Mid-Summer Lull and the Mess

Most cottage borders peak in June and then slump. You can close that gap with a few simple habits. Cut Nepeta and hardy geraniums back hard straight after their first flush, and they will flower again in six weeks. Deadhead roses and penstemons weekly. Stake only what truly needs it, using twiggy hazel or birch pea sticks pushed in among the plants rather than canes and string, which look out of place in a relaxed scheme.

Water newly planted borders properly for their first two summers, then only in dry spells. Feed in early spring with a general granular fertiliser and mulch with compost to lock in moisture and keep weeds down. A border is never finished, and that is fine. Leave seedheads standing through winter for the birds, cut back the whole bed in late February or early March, and start the cycle again with a fresh eye and a new packet of tulips.